ISB News

ISB in Antarctica: Algae Samples

It’s not all about water. Studying the cycle of carbon in the sea is a huge undertaking. There are so many parts to look at all the way from the sea surface to the deepest depths. The Ross Sea ranges from about 500 to 1,200 meters deep. Scientists on board want a closer look at the sea’s bottom.

We have cameras that are able to take photos of the sea floor. There are many creatures living down there and they have no idea what is happening at the surface. All they see are the remains of the organisms that once lived at the surface and have sank to the bottom after they died.

The floor is scattered with sea stars, anemones, slug-like creatures, centipede-like creatures, worms and the occasional fish.

Sediment Grab

A claw was sent down to take a sediment grab. This instrument grabs the top surface of the sea floor as well as the water sitting right above it. The whole grab is brought back on the deck of the ship and everyone is excited to see what it holds.

These images are from that thin layer of water above the sea floor. The microscope uses a mercury lamp to shine blue light on to the sample. When blue light shines on algae they glow red because of their chloroplasts, which are unique to plants and algae. Chloroplasts are used for photosynthesis—fixing carbon dioxide in to oxygen using sunlight and water. Note that the copepod (left photo) does not glow red because it is an animal and does not have chlorophyll. The photo to the right is a mixed population of many different types of algae.

Recent Articles

  • Spotlight on ISB Education graphic

    2024-25 School Year ISB Education Highlights

    In the first installment of the 2024-25 academic year roundup, we highlight some of the top projects the ISB Education team is working on. In October, we welcomed new team members, developed a new format for our popular “Systems Are Everywhere!” workshop, and more.

  • 2024 ISB Virtual Microbiome Series

    Our multi-day microbiome-themed virtual course and symposium is back for the fifth year! ISB is hosting a two-day course on October 16 & 17, 2024, followed by a symposium on October 18, 2024 titled, “A gut feeling: Microbes and their impacts on our minds.” Both events are virtual and free.

  • Fluidized bed reactor

    How Microbes Evolve to Spatially Divide and Conquer an Environment 

    ISB researchers examined representative organisms of two classes of microbes whose interaction contributes to the conversion of more than 1 gigaton of carbon into methane every year. They found that gene mutations selected over a relatively short timeframe in the two microbes led to distinct functions.